AmSurg Corp., through its subsidiaries, provides ambulatory and physician services in the United States. The company operates through two divisions, Ambulatory Services and Physician Services. The Ambulatory Services division acquires, develops, and operates ambulatory surgery centers (ASCs) in partnership with physicians. This division performs colonoscopy and other endoscopy procedures in the areas of gastroenterology; cataracts and retinal laser surgeries in the area of ophthalmology; and knee and shoulder arthroscopy and carpal tunnel repair in the area of orthopedics. The Physician Services division provides outsourced physician services to hospitals, ASCs, and other healthcare facilities primarily in the areas of anesthesiology services; children’s services, such as neonatal management services specializing in acute inpatient care and treatment of infants; emergency medicine services; and radiology services, including diagnostic, and interventional and tele radiology services to hospitals, imaging centers, and physician group practices, as well as other services. As of December 31, 2014, the company owned and operated 246 ASCs in 34 states and the District of Columbia in partnership with approximately 2,000 physicians; and provided physician services to approximately 320 healthcare facilities in 24 states. It offers its surgery center services directly to patients; referring physicians; and third-party payors, including health maintenance organizations, preferred provider organizations, other managed care organizations, and employers. The company was founded in 1992 and is headquartered in Nashville, Tennessee.